* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0f0c1a;
  --bg-2: #1a162e;
  --surface: #25203b;
  --surface-2: #322c4f;
  --text: #e8e3f5;
  --text-muted: #a8a2b8;
  --accent: #a78bfa;
  --accent-hover: #8b5cf6;
  --accent-active: #7c3aed;
  --border: #4a4068;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
}

html, body {
  height: 100%;
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  cursor: pointer;
  font-family: inherit;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== App Layout ===== */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
}

.app.main-view {
  flex-direction: row;
}

/* ===== Auth Screen ===== */
.auth-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

.auth-card h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.2);
}

.btn-primary {
  width: 100%;
  padding: 1rem;
  background: var(--accent);
  color: #1e1b4b;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:active:not(:disabled) {
  background: var(--accent-active);
}

.btn-primary.loading {
  position: relative;
  color: transparent;
}

.btn-primary.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-secondary {
  width: 100%;
  padding: 0.85rem;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  margin-top: 0.75rem;
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.divider {
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-top: 1px solid var(--border);
}

.divider span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.google-btn {
  width: 100%;
  padding: 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.google-btn:hover:not(:disabled) {
  border-color: var(--accent);
}

.error-text {
  color: var(--error);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
  display: none;
}

.error-text.show {
  display: block;
}

.auth-footer {
  margin-top: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.auth-footer a {
  color: var(--accent);
  font-weight: 600;
}

/* ===== Sidebar ===== */
.sidebar {
  width: 320px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.sidebar.collapsed {
  width: 0;
  overflow: hidden;
}

.sidebar-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.sidebar-header h2 {
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.sidebar-header p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sidebar-content {
  padding: 1rem 1.25rem;
  overflow-y: auto;
  flex: 1;
}

.settings-group {
  margin-bottom: 1.5rem;
}

.settings-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.settings-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.settings-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.2);
}

.settings-group button {
  width: 100%;
  padding: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.settings-group button:hover {
  border-color: var(--accent);
}

.settings-group button.primary {
  background: var(--accent);
  color: #1e1b4b;
}

.settings-group button.primary:hover {
  background: var(--accent-hover);
}

.settings-group button.secondary {
  background: transparent;
}

.settings-group button.secondary:hover {
  background: var(--surface-2);
}

.setting-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.setting-item input[type="radio"] {
  width: auto;
  margin: 0;
}

.setting-item label {
  margin: 0;
  font-size: 0.9rem;
}

.setting-item.selected {
  border-color: var(--accent);
  background: rgba(167, 139, 250, 0.1);
}

.model-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.model-status.success { color: var(--success); }
.model-status.error { color: var(--error); }

.toggle-sidebar {
  padding: 0.5rem 1rem;
  background: var(--surface-2);
  border: none;
  color: var(--text);
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  text-align: left;
  width: 100%;
}

.toggle-sidebar:hover {
  background: var(--surface);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header-bar {
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 5;
}

.header-bar h1 {
  font-size: 1.25rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-bar .user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-bar .user-badge {
  font-size: 0.8rem;
  background: var(--surface-2);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  color: var(--text-muted);
}

.signout-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
}

.signout-btn:hover {
  border-color: var(--error);
  color: var(--error);
}

.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quote-generator {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.generator-header {
  margin-bottom: 1rem;
}

.generator-header h2 {
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.generator-header p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.textarea-group {
  margin-bottom: 1rem;
}

.textarea-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.textarea-group textarea {
  width: 100%;
  min-height: 120px;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
}

.textarea-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.style-note {
  width: 100%;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.style-note:focus {
  outline: none;
  border-color: var(--accent);
}

.gen-btn {
  width: 100%;
  padding: 1rem;
  background: var(--accent);
  color: #1e1b4b;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

.gen-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.gen-btn.loading {
  position: relative;
  color: transparent;
}

.gen-btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.gen-result {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: none;
}

.gen-result.show {
  display: block;
}

.gen-result h3 {
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Result columns: original vs generated side by side */
.result-columns {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.result-column {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
}

.original-column { border-left: 3px solid var(--accent); }
.generated-column { border-left: 3px solid var(--success); }

.result-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.original-column .result-label { color: var(--accent); }
.generated-column .result-label { color: var(--success); }

.result-column p {
  font-size: 0.95rem;
  line-height: 1.6;
  word-wrap: break-word;
}

.length-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-family: monospace;
}

.gen-result .length-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-family: monospace;
}

.quotes-list {
  display: grid;
  gap: 1rem;
}

.quote-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.quote-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.quote-card h3 {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.quote-card p {
  font-size: 1rem;
  color: var(--text);
}

.quote-card .meta {
  margin-top: 0.75rem;
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.quote-card.regenerated {
  border-color: var(--success);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state h3 {
  margin-bottom: 0.5rem;
  color: var(--text);
}

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.toast {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  display: none;
  z-index: 100;
}

.toast.show {
  display: block;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--error); }
.toast.info { border-color: var(--accent); }

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .app.main-view {
    flex-direction: column;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    width: 320px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.collapsed {
    width: 320px;
    transform: translateX(-100%);
  }

  .header-bar {
    padding: 1rem;
  }

  .content-area {
    padding: 1rem;
  }

  .main-content {
    padding-top: 0;
  }

  .result-columns {
    flex-direction: column;
  }
}